90+ hp/tq build
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From: la la land jerzey
we have a NHRA super gas car and that and back cutting valves is the only way to win - johnjzjz
Tourer
Joined: Dec 2010
Posts: 333
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From: southern Alberta Canada
Oh I'm researching (pretty sure I'll never highly modify the original engine in my bike if i want serious power than it will come out and a crate motor will go in.) as a gearhead who knows quite a bit about car performance and very little about harley performance I gotta say this thread is a great research tool for someone like me who in the future hopes to build some harley engines
Seasoned HDF Member
Joined: Nov 2006
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From: la la land jerzey
Oh I'm researching (pretty sure I'll never highly modify the original engine in my bike if i want serious power than it will come out and a crate motor will go in.) as a gearhead who knows quite a bit about car performance and very little about harley performance I gotta say this thread is a great research tool for someone like me who in the future hopes to build some harley engines
Banned
Joined: Jan 2013
Posts: 418
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From: Overseas
I was thinking no more than a modest 45 thou off with 30 thou gaskets to keep the compression reasonable, not much more. Do you really think it will mess up the angles that much? I'm thinking not. My idea is to make it a little more porky, especially low down, but to avoid any of the hassles of going high performance. High speed/WOT I just don't ever use it.
I'd never heard of him before but we do similar stuff directing flame fronts around heads and creating tumbles and swirls in the ports. We move the plugs too ...
Last edited by Homeward Bound; Nov 5, 2013 at 01:43 AM.
Banned
Joined: Jan 2013
Posts: 418
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From: Overseas
That Faribault Harley is doing really well. 88.8 hp and 96 ft/lbs ... and still building on a STD carb.
Last edited by Homeward Bound; Nov 5, 2013 at 01:54 AM.
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From: la la land jerzey
I was following that ... but where did the .604 lift come from? I'm sticking with a EV-23 which is .498 lift as standard, and pretty much what the stock early model evo cams were like, hence .536.
I was thinking no more than a modest 45 thou off with 30 thou gaskets to keep the compression reasonable, not much more. Do you really think it will mess up the angles that much? I'm thinking not. My idea is to make it a little more porky, especially low down, but to avoid any of the hassles of going high performance. High speed/WOT I just don't ever use it.
Interesting ... I hate the guy's website, it's incoherent. All that "save the world" stuff smacks of desperation and indicates to me that the industry is completely disinterested in him ... and especially paying to use his idea.
I'd never heard of him before but we do similar stuff directing flame fronts around heads and creating tumbles and swirls in the ports. We move the plugs too ...
I was thinking no more than a modest 45 thou off with 30 thou gaskets to keep the compression reasonable, not much more. Do you really think it will mess up the angles that much? I'm thinking not. My idea is to make it a little more porky, especially low down, but to avoid any of the hassles of going high performance. High speed/WOT I just don't ever use it.
Interesting ... I hate the guy's website, it's incoherent. All that "save the world" stuff smacks of desperation and indicates to me that the industry is completely disinterested in him ... and especially paying to use his idea.
I'd never heard of him before but we do similar stuff directing flame fronts around heads and creating tumbles and swirls in the ports. We move the plugs too ...
the head picture is interesring it is exactly what the 4 valve overhead cam ja p bikes have / a double lift in the combustion chamber but instead of it being flat, you have a tub i would believe the flat one makes more power but hemi's respond to almost anyting, when i was a lot younger the then top drag race guys did all kinds of things to them / they, tryed to them everything and still today, no one but the guys with more time than anyone else gets it wining gas of alky hemi noticed --
his politics aside we was on to something and i believe it was this ( on the back side of the compression stroke and during the power stroke to have set in motion a cycle to burn everything and end with the exhaust valve opening free of all HC ) now that has been achieved but not with the grooves only, but they do help with the speed in the chambers flame front -- Now i am taking about very high end race motors / using a motor dyno with a time element to plot the speed of torque you can see it -- johnjzjz
Last edited by johnjzjz; Nov 5, 2013 at 08:15 AM.
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From: Ohio
Singh grooves in a Twinkie head, do they work in theory? do they work in the real world? Snake oil? Modern marvel? 8th wonder of the world? 15 extra HP? Engine builder upsell? Crap who knows
Last edited by 1997bagger; Jan 26, 2019 at 11:57 PM.
Road Captain
Joined: Mar 2006
Posts: 579
Likes: 26
From: Virginia
I've been drinking so I can't remember if I posted pics of the port work on my stage 1 heads or not… so here it goes:
All the parts going in my evo:
All the parts going in my evo:
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From: la la land jerzey
I was glad to see you dident fall into the snake oil / polish the port to a mirror -
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
Ok harley all of them have an over stroke / more stroke than bore and the dwell time is longer, sooo your combustion crush at TDC is longer --- a short conecting rod motor like a BBC w/ 4.600 bore X 3.76 using a short deck block gives you a short rod ability - you snap the rod off the top of the block you dont let it dwell and by using an asymmetrical cam you get the negitave wave to become a suction on the intake valve -- < in this case it has a an affect i guess you will have to take my word for it if not thats ok as well -- johnjzjz